Driving-chain



(No Model.)

B. F. MORSE. DRIVING CHAIN.

' No. 583,150. Patented May'25,1897.

vided with my improved joint.

UNITED STATES PATENT i FFICE.

EVERETT F. MORSE, OF TRUMANSBURG, NEW YORK.

DRIVING-CHAIN.

SPECIFICATION forming part of Letters Patent No. 583,150, dated May 25,1897.

Serial No. 473,658. (No model.)

To ttZZ whom it may concern:

Be it known that I, EVERETT F. MORSE, a citizen of the United States,residing at Trumansburg, in the county of Tompkins and State of NewYork, have invented certain new and useful Improvements in Drive-Chains,of which the following is a specification.

My invention relates more particularly to the joints of the chains, andhas for its object to provide a frictionless joint and means foruncoupling a chain provided with my improved joint. I attain theseobjects by the mechanism illustrated in the accompanying drawings, inwhich Figure 1 is a side elevation of a chain pro- Fig. 2 is a plan viewof the same. Fig. 8 is a side elevation of a chain with modified form ofmy improved joint.

Referring to the drawings, a a are central links, and b b the sidelinks, arranged as usual and having the usual opening between them toreceive the teeth of the sprocket-wheels. The central links are providedwith two cylindrical apertures, one near each end, as shown. Througheach of these holes extends a two-part pintle consisting of twosegmental circular rocking pins 0 and e, which have a rocking or rollingengagement with one another and constitute what may be called a rockingbearing. While one of these pins, 0, is no longer than the width of thecentral link and is confined therein against longitudinal displacement.by the side links, the other pin, 6, projects from each side of thecentral link through apertures fitting the ends of pins e and providedin the ends of the side links.

Referring to Figs. 1 and 2, c is the seatpin, the principal feature ofwhich is the bearing-surface 19, facing the pressure of the joint andpreferably of a concave or inwardly-curving form, being deepest in themiddle, which should preferably coincide with the axis of aperture 77..From this bearing-surface the sides of the pin diverge until they meetthe opposite curved base, which is made to fit the curvature of apertureh, so as to form a more extended rocking or rolling surface forengagement with the seat-pin, which might be I found necessary in usingrocking pins of eX- treme hardness.

The principal feature of the knife-edge pin 6, Fig. 1, is the knife-edgeit, which bears against the middle of the bearing-surface p. The sidesof this pin also diverge from the knife edge until they meet theopposite curved base, which is made to approximately fit the curvatureof aperture h, although this fitting in this or the seat-pin is notessential. The open space between the sides of pins 0 and e is adj nstedin amou nt to permit the desired angular motion of the joint beingeffected by one pin rocking 011 the other. Both pins are made of steeland hardened, so the knife-edge 7c and base 1) may better endure thepressure of the joint. While in Fig. 1 the bearing-surfacep is providedon the shorter pin, in Fig. 3 a modified form is shown having theknife-edge provided on the shorter pin, and although they are thusinterchangeable, the longer pin being subjected to transverse strain, itis best to choose for it the bearing-surface, as with it the longer pincan be given a stronger crosssection, as shown in Fig. 3.

The concave or trough form of the bearing-surface 1') tends to retainthe knife-edge in its central or true position. This would also be thecase even if the edge were rounded.

Thea-ngular motion of any two adjoining links relatively to each otheris oscillatory, turning one way as thelinks meet the sprocket-wheels andthe opposite way as they leave the Wheels. In providing for this motionthe the side links 17 b, rocks on the shorter pin 0, which turns withthe central links a, in which it may obviously be retained in a fixedposition, if desired.

It is desirable to have one place in the chain where it can easily betaken apart. For this purpose one of the longer pins has a threaded nutthat can be unscrewed and the pin removed, thus parting the chain. On

account of the pin ebeing of an irregular cross-section adapted to myjoint, a supplemental metallic piece n, havinga shape suitable tocomplete the circular form of pin 6, is fitted to the latter justoutside of the side longer pin e, which is restrained to turn withlinkZ). A thread is cut on both the end of.

pin 6 and piece a and the nut screwed on while piece n is in positionshown.

Vhat I claim as new, and desire to secure by Letters Patent, is

1. A chain having a rocker-bearing between the members composed of twohardened pins rocking on one another one of which is fastened in theside links while the other is located in the middle link and heldagainst longitudinal displacement by the side links, substantially asand for the purpose set forth.

2. In a drive-chain, a pintle consisting of two parts one rigidly fixedto and completing one member of the chain and the other a hardened pinmounted in an opening in the cooperating member, said two parts of thepintle sustaining between them the strain upon the chain while providingat the surface between them a bearing for the rocking or rolling of theone part upon the other.

3. In a drive-chain, the combination with the side links and a bearingseat-pin connecting them and passing through an opening in the middlelink, of a hardened bearing-pin mounted in said opening to rock or rollupon said seat-pin and sustain the strain of the chain.

4. In a drive-chain, a pintle consisting of two parts one rigidly fixedto and completing one member of the chain and the other-mount ed in thecooperating member, said two parts of the pintle being hardened andconstituting segmental rocking pins one having a bearing edge and theother a bearing-surface therefor and sustaining between them the strainupon the chain while providing at the bearing edge the pivotal centerfor the oscillation of said united members.

5. In a drive-chain consisting of side links, central links and two-partpintles, the combination with the side links of one member of the chain,of one part of the pintle connecting said links at either end and havinga hardened bearing-surface along its axis, and the other part of thepintle provided with a hardened bearing edge cooperating with saidbearing-surface and mounted in the end of the central link,substantially as shown and described.

6. The combination with the side and central links of a drive-chain, ofa seat-pin and rocking pin arranged side by side within a suitableaperture in the central links and adapted to rock 011 each other, saidseat-pin being provided with a concave bearing-surface facing the forceof the joint and on which the rocking pin rocks, one of said pins beinglonger than the other and having its ends extending through the sidelinks and rigidly connected thereto.

7. In a driving-chain, the combination with a segmental circular jointpin extending through the side and central links of said chain, of acomplemental piece arranged against the end of the irregular side ofsaid joint-pin and having a curved side substantially completing thecircle of the curved side of the joint-pin, threads being provided onthe supplemental piece and end of the jointpin on which a nut isscrewed, substantially as described.

8. In a drive-chain, a link provided with an aperture and having twohardened-steel pins inserted therein side by side, and adapted to rockor roll one upon the other and sustaining on their abuttingrockingsurfaces the strain of the chain.

9. In a drive-chain, the combination with the side links, of a hardenedscat-pin secu red therein at its ends and passing through an aperture inthe middle link and having a seat or bearing-surface formed in one sidethereof to receive a cooperating member inserted in the aperture in themiddle link.

EVERETT F. MORSE.

Vi tncsscs:

CHAUNCY P. GREGG, FRANK L. Monsn.

